Mounting apparatus for the wearing blocks of casting vessels equipped with a slide closure mechanism

ABSTRACT

A MOUNTING APPARATUS FOR THE WEARING BLOCKS OR STONES OF CASTING VESSELS PROVIDED WITH A SLIDE CLOSURE MECHANISM INCLUDING A SLIDE HOUSING. THE INVENTIVE APPARATUS INCLUDES A SPINDLE MECHANISM WHICH IS DETACHABLY CONNECTED WITH THE SLIDE HOUSING. THIS SPINDLE MECHANISM INCORPORATES AT LEAST ONE AXIALLY DISPLACEABLE CENTERING AND PRESSURE SPINDLE MEANS SERVING FOR PRESSING IN THE BLOCKS TO A CERTAIN PREDETERMINED DEPTH IN A CENTERED POSITION WITH RESPECT TO THE SLIDE HOUSING.

Filed Feb. 27, 1968 Jan. 5, 1971 B. T|NNE$ MOUNTING APPARATUS FOR THE WEARING BLOCKS OF CASTING VESSELS EQUIPPED WITH A SLIDE CLOSURE MECHANISM 3 Sheets-Sheet 1 INVENTOR BERN/MPO 77A/A/E5 ATTORNEYS Filed Feb. 27, 1968 Jan. 5, 1971 HNNES 3,551,989

MOUNTING APPARATUS FOR THE WEARING BLOCKS OF CASTING VESSELS EQUIPPED WITH A SLIDE CLOSURE MECHANISM 5 Sheets-Sheet 2 INVENTOR EF/f/VHAFO 77A/A/E5 ATTORNEYS Jan. 5, 1971 HNNESI 3,551,989

Y v MOUNTING APPARATUS FOR THE WEARING BLOCKS OF CASTING VESSELS EQUIPPED WITH A SLIDE CLOSURE MECHANISM Filed Feb. 27, 19 68 I 3 Sheets-Sheet 3 INVENTOR sA/H/wa 77/VA/E5 ATTORNEYS United States Patent 3,551,989 MOUNTING APPARATUS FOR THE WEARING BLOCKS OF CASTING VESSELS EQUIPPED WITH A SLIDE CLOSURE MECHANISM Bernhard Tinnes, Zollikon, Switzerland, assignor to Metacon AG, Zollikon, Switzerland, a corporation of Switzerland Filed Feb. 27, 1968, Ser. No. 708,664 Claims priority, application Switzerland, Mar. 3, 1967, 3,175/ 67 Int. Cl. B23p 19/04 US. Cl. 29-252 14 Claims ABSTRACT OF THE DISCLOSURE A mounting apparatus for the wearing blocks or stones of casting vessels provided with a slide closure mechanism including a slide housing. The inventive apparatus includes a spindle mechanism which is detachably connected with the slide housing. This spindle mechanism incorporates at least one axially displaceable centering and pressure spindle means serving for pressing in the blocks to a certain predetermined depth in a centered position with respect to the slide housing.

BACKGROUND OF THE INVENTION The present invention relates to an improved mounting or installation apparatus for the wearing blocks or stones of casting vessels or containers, and, in particular, casting or pouring ladles, provided with a slide closure mechanism.

In casting or pouring ladles equipped with a slide closure mechanism, not only are the apertured bottom block or stone arranged at the floor of the ladle and the sleeve member lining this apertured bottom block subjected to consider-able wear, but also in particular the base plate which cooperates with the movable slide block. Although the replacement of the slide block or stone, which is subjected to considerable wear and thus must be replaced quite often, is relatively simple by removing the cover member of the slide housing during dismantling of the movable slide component, the installation or mounting of a new bottom block sleeve member or a new base plate is relatively difficult. This is so because the bottom block sleeve member and the base plate must be inserted such that their throughflow openings are exactly coaxially arranged with respect to one another, and further, because the surface of the base block must assume an exactly predetermined position with respect to the confronting slide block, in order that the functionality of the slide closure mechanism is ensured. What is most difficult about the whole procedure is that the installation must take place at the underside of the ladle. Furthermore, this mounting or installation must be performed quite quickly in order that the components will assume their predetermined position before hardening of the plaster or mortar.

SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide an improved mounting or installation apparatus for such components provided at a casting vessel equipped with a slide closure mechanism, and wherein, according to the invention, the housing of the slide closure mechanism is effectively employed as a component of the mounting or installation apparatus.

A further, more specific object of the present invention relates to an improved mounting or installation apparatus for the wearing blocks of casting vessels equipped with a slide closure mechanism, wherein it is possible to insert 3,551,989 Patented Jan. 5, 1971 these wearing blocks in a relatively simple, quick and efficient manner, with extreme accuracy and proper alignment of these wearing blocks so that they assume the correct position.

Generally speaking, the inventive mounting apparatus is characterized by the features that a spindle mechanism is detachably secured to the housing of a slide closure mechanism and is centered by such housing. This spindle mechanism is provided with at least one axially displace able centering and pressure spindle serving to press in for a predetermined depth the blocks of stones in a centered position with respect to the slide housing.

The slide housing, which itself is secured to the bottom or floor of the ladle in a centered position, of course permits a faultless centering of the spindle mechanism along the axis of the throughflow opening provided at the floor of the ladle, and at the same time, it also provides reference or impact surfaces by means of which the depth of penetration of the blocks or stones and, particular, the base plate is exactly fixed or determined and its underside can be placed in the parting or separation plane.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood, and objects other than those set forth above, will become apparent, when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings, wherein:

FIG. 1 is an axial sectional view through a first embodiment of inventive mounting or installation apparatus shown secured to the slide housing of a slide closure mechanism;

FIG. 2 illustrates a second embodiment of inventive mounting or installation apparatus, likewise in axial sectional view; and

FIG. 3 is a sectional view of a further embodiment of inventive mounting or installation apparatus.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings, in FIG. 1 reference numeral 2 represents the floor or bottom of a casting vessel or container, for instance a casting or pouring ladle. This casting ladle is provided with an opening 4 at its floor portion 2. An apertured bottom block or stone 6 is disposed in the opening 4. This bottom block or stone 6, which is surrounded by a non-illustrated refractory lining of the casting ladle, includes a central conical bore 8 capable of receiving a bottom block sleeve member 10. Furthermore, the slide housing 14 of a slide closure mechanism is secured by means of screws 12 or equivalent fastening expedients to the casting ladle floor 2. The conventional housing cover member has been removed as well as also the movable slide member in order to preserve clarity in illustration. Still, for a more complete understanding of the components of the slide closure mechanism reference may be readily had to my commonly assigned copending US. application, Ser. No. 706,976, filed Feb. 2, 1968, entitled Casting Installation.

A spindle mechanism, generally designated by reference numeral 20, is detachably secured to the slide housing 14 by means of screw members 16 or the like which are pivotably secured to such housing 14. These screw members 16 piercingly extend through a support or retaining plate 22 which bears against the underside of the housing 14. The support plate 22 carries a downwardly de pending guide sleeve 24, as shown. The lower end of this guide sleeve 24 is closed by a threaded nut member 26 into which there is threaded a contact or bearing spindle 28. This contact or bearing spindle 28 cooperates with a press plunger or piston 30 which is axially displaceable in the guide sleeve 24. The press piston or pressure spindle 30 is prevented from rotating by a pin member 32 which is im-bedded in such press piston, this pin member engaging with a longitudinal groove 34 provided at the inner wall of the guide sleeve 24. Additionally, an entrainment ring member 36 secured to the lower end of the press piston or plunger 30 engages behind the front end of the spindle 28, as shown, in order to retract the plston 30 when appropriately rotating the contact or bearing sp1ndle 28.

Continuing, it will be seen that the press piston 30 carries at its front end an annular pressure plate 38 which is rigidly attached to the press piston 30. Furthermore, this pressure plate 38 is provided at its front face confronting the housing 14 with centering cams or ledges 40, and further, with two pair of impact legs or members 42 which are diametrically arranged at the peripheral region of such pressure plate 38, as shown. Also, the pres sure plate 38 supports a spacer ring member 44 which is arranged coaxially and attachably with respect to the aforesaid pressure plate 38. In the depicted position of the exemplary illustrated embodiment the bottom block sleeve member 10, which is to be inserted in the conical bore 8 provided at the apertured bottom block or stone 6, is seated upon this spacer ring 44.

A centering mandrel 46 engages with the bottom block sleeve member 10. This centering mandrel 46 is detachably secured to the front end of a centering spindle 48. As clearly shown in FIG. 1, this centering spindle 48 piercingly extends through the spacer ring member 44, the pressure plate 38, the press piston 30 and the contact or bearing spindle 28, and then engages with a nut member 50 mounted at the rear end of the contact spindle 28. Actuation of the contact spindle 28 can be conveniently performed by a handcrank 52 or equivalent device, which, is rigidly connected for rotation with the spindle 28 by means of an attachment ring member 54 seated at the rear end of the spindle 28 and a clamping nut member 56. On the other hand, the centering spindle 48 is provided at its rear end with a square shaft 58 engaged by a handcrank 60.

In the illustrated position of the centering spindle 48 and the handcrank 60 this spindle 48 is entrained by the rotation of the contact or bearing spindle 28 imparted by the handcrank 52. Thus, upon screwing the contact spindle 28 in the direction of the housing 14 the centering spindle 48 together with the centering mandrel 46 likewise moves in a direction towards the housing 14 and the bottom block or stone 6. At the same time the press piston or plunger 30 together with the pressure plate 38 and the spacer ring member 44 are displaced towards the bottom block or stone 6, so that the bottom block sleeve member is introduced into the substantially conical bore 8 provided at such bottom block 6. The housing 14 is provided with two oppositely arranged impact cams 18 which are disposed at the path of travel of the impact members 42 which are provided at the pressure plate 38. The impact members 42 bear against these impact cams 18 when the bottom block sleeve member 10 has assumed its predetermined terminal position in the bore 8. The centering of the bottom block sleeve member 10 in this bore 8 is ensured for by virtue of the fact that the spindle mechanism assumes an exactly predetermined position with respect to the housing 14, for instance by means of positioning bolts or the like which are provided at the housing 14 and which engage in the support plate 22. These positioning bolts can simultaneously serve to determine the position of the housing cover member of the slide closure mechanism, as such has already been described in detail in my aforementioned co-pending, commonly assigned U.S. application.

When the spindles are retracted after pressing in the bottom block sleeve member 10, it is important that the spindle 48 can be threadably retracted independently of the contact or bearing spindle 28. As a result, it. is possible to prevent the centering mandrel 46 from again loosening or displacing the bottom block sleeve member 10 out of its predetermined position during retraction thereof, in the event that the mortar or plaster which holds the bottom block sleeve member 10 has not yet sufficiently hardened. Any forces which possibly result during retraction of the centering mandrel 46 are taken up by the spacer ring 44 and the pressure plate 38. As soon as the centering mandrel 46 has completely released the bottom block sleeve member 10, then the pressure plate 38 together with the spacer ring 44 can be retracted by rearwardly rotating the contact or bearing spindle 28.

Although in the illustrated embodiment the centering mandrel 46 is, for example, rigidly connected for rotation with the centering spindle 48, it can be advantageous to provide a rotatable connection between these two members, so that only axial forces are transmitted. Hence, it is possible to prevent the centering mandrel 46 from transmitting a moment of rotation to the bottom block sleeve member 10 due to friction.

Furthermore, by means of the exemplary illustrated embodiment of inventive mounting or installation apparatus, it is also possible to press the bottom block or stone into the housing, in that this bottom block or stone is arranged in a centered position at the pressure plate 38 owing to the action of the cam members 40. During this mode of operation the spacer ring 44 is removed from the pressure plate 38.

Reference will now be made to the embodiment of inventive mounting apparatus shown in FIG. 2. This embodiment differs from that shown in FIG. 1 in that, here the movement of the pressure plate and the centering mandrel takes place hydraulically instead of through the agency of manually actuatable threaded spindles.

Referring now to the embodiment of mounting apparatus shown in FIG. 2, it will be understood that the spindle mechanism which is connected with the housing 14 in the same manner as described in conjunction with the embodiment of FIG. 1, possesses a cylinder member 76 which is secured by means of a flange member 74 to a guide sleeve 72. As shown, the cylinder member 76 extends into the guide sleeve 72 and is closed at its lower end by means of a cover member 78. Cylinder member 76 contains a piston member 80 which is displaceable within the cylinder member 76. Piston member 80 carries a sleeve-shaped extension or projection 82 and also a cylindrical extension 84. The substantially sleeveshaped extension 82 extends through the bottom or floor of the cylinder 86, as shown, and is operably connected in any suitable fashion with a press piston or plunger 86. This press piston or pressure spindle 86 engages about the cylinder member 76 and is guided for longitudinal displacement in the guide sleeve 72. In order to prevent any rotation of the press piston 86 in sleeve 72, the press piston 86 carries a radially extending pin member 88 which engages with a longitudinal groove 90 provided at the inner Wall of the guide sleeve 72.

Apart from the foregoing structure, the press piston 86- carries a pressure plate 38 at its upper end protruding past the guide sleeve 72. This pressure plate 38 corresponds exactly to the pressure plate used in the embodiment of FIG. 1. Furthermore, pressure plate 38 is equipped with centering cams 40 and impact legs or members 42. As will be best recognized by referring further to FIG. 2, a base stone or plate 92 which is supported upon the pressure plate 38, and is shown in phantom lines, is engaged at its periphery by the centering cams 40 and is held in centered position with respect to the pressure plate 38. Furthermore, a centering mandrel 94 is provided to additionally center the base plate or stone 92. This centering mandrel 94 is fixed by screw means 96 or the like to the front end of a centering spindle 98. The centering mandrel 94 engages with the through-passage opening of the base plate or stone 92. The centering spindle 98 piercingly extends through the press piston or plunger 86 and the sleeve-shaped extension 82 of the double-acting piston 80. The rear end of the centering spindle 98, which carries a piston member 102, extends into the cylinder compartment 104 of the extension 84 of the piston member 80. Now, the piston member 102 can be selectively contacted at each face with a pressurized medium, for instance pressurized oil, which is supplied by a non-illustrated source. More precisely, in order to advance the centering spindle 98 the piston member 102 is contacted by pressurized medium admitted through the bore 108 provided at the cover member 106 of the cylindrical compartment 104. On the other hand, in order to retract the centering spindle 98 the other face of this piston member 102 is contacted by pressurized medium which is admitted by means of the bore 110 provided at the wall of the extension 84 of the piston member 80. This piston member 80 can also be impacted with a pressurized medium in much the same manner as the piston member 102. To this end, it will be seen that a bore 112 is provided at the cover member 78 in order to admit the pressurized medium to one face of the piston member 80 and, on the other hand, a bore 114 is provided in the wall of the cylinder 76 in order to admit pressurized medium to the opposite face of the piston member 80. The cover member 78 is provided with an opening 116 in order to conveniently provide access to the bore 114.

In the position of the components depicted in FIG. 2, the spindle mechanism 70 is prepared to introduce the base stone or plate 92 in the appropriate recess of the housing 14. Thus, when the piston member 80 is impacted by pressurized oil received through the bore 112, the larger downwardly facing surface of the piston member 102 is also impacted with pressurized medium received through the associated bore 108. Consequently,

the centering mandrel 94 moves forward together with the pressure plate 38 and assists in properly introducing the base plate or stone 92 into an exactly predetermined position in the appropriate recess of the housing 14 provided for receiving the base stone 92. Once again, the forward movement of the pressure plate 38 is limited when the impact members 42 contact the stop members or cams 18 provided at the housing 14, and as previously considered in connection with the embodiment of FIG. 1.

In order to detach the spindle mechanism 70 from the housing 14, the mandrel 94 is initially retracted out of the base plate or stone 92. This can be achieved by introducing pressurized medium to the smaller surface of the piston 102 through the agency of the bore member 110, whereas the other face of the piston member 102 is relieved of pressure via the associated bore 108. Now if the centering mandrel 94 has released the base plate or stone 92, in other words has moved out of the bore 100 of such base stone 92which occurs when the centering mandrel 94 has been retracted back into the recess 118 of the pressure plate 38then it is also possible to retract the pressure plate 38. This is done by introducing pressurized medium through the bore 114 in order to impact the upper face of the piston member 80 and at the same time allowing any pressurized medium contacting the opposite face of the piston member 80 to discharge through the bore 112 Of course, it would also be possible to actuate the centering mandrel 94 mechanically, that is by means of a threaded spindle, even though displacement of the pressure plate 38 takes place via the piston member 80.

From the foregoing discussion it should be apparent that owing to the exactly predetermined position assumed by the spindle mechanism 70 with regard to the housing 14, and further, in view of the centered guiding of the pressure plate 38 as well as the centering mandrel 94, it is possible to provide an introduction and pressing in of the base stone or plate 92 in such a way that this base stone always is brought into the required relative position necessary to properly cooperate with the slide member of the slide closure mechanism. Furthermore, it is additionally pointed out that by exchanging the centering mandrel 94 for a centering mandrel 46 of the type shown in FIG. 1, and by securing a spacer plate or ring 44 upon the pressure plate 38 of FIG. 2, the just considered embodiment canalso be efiectively employed for inserting a bottom block sleeve member 10.

The coaxial position of the centering spindle with respect to the pressure or contact spindle presupposes that the stone which is to be pressed in is arranged, independently of its cross-sectional configuration and the position of the throughfiow opening provided in such, in such a way upon the pressure spindle or on a pressure plate carried by such, that the centering spindle can engage in the throughfiow opening. With bottom block sleeve members or with smaller base plates, that is to say with stones in which the geometric center of their plan surface is pierced by the axis of the throughfiow opening or the spacing of the geometric center from the aforementioned axis is small in relation to the corresponding dimensions, for instance the length of the stone, this construction of the spindle mechanism with a centering spindle which is arranged coaxially with respect to the pressure spindle, does not cause any difficulties. Especially with larger base plates, where a saving in the cost of refractory material is of greater importance, the use of stones which are unsymmetrical with respect to their throughfiow opening suggests itself, whereby the spacing between the geometric center of the cross-sectional or plan surface of the base plate and the axis of its throughfiow opening can be quite considerable. Owing to the application of force by the pressure spindle outside of the geometric center of the base plate, the great danger exists when pressing the base plate into the corresponding recess of the slide housing, that this base plate will be tilted. As a result, the base plate does not assume the parallel position with respect to the displaceable slide stone which is absolutely necessary. Consequently, the control slide mechanism is not capable of functioning properly.

Accordingly, the present invention is also concerned with the provision of an apparatus in which this difficulty can be prevented during the installation or mounting of larger stones which are constructed to be unsymmetrical with regard to their throughfiow opening. Specifically, this is achieved in that the centering mandrel supported at the pressure spindle and which engages with the throughfiow opening of a Wearing stone is eccentrically arranged with respect to the axis of the pressure spindle. Since the eccentricity of the centering mandrel is selected in accordance with the spacing of the geometric center of the plan surface of the stone from the axis of the throughfiow opening, it is possible by virtue of this measure to effectively prevent any tilting of the stone during such time as it is pressed in.

Now, in FIG. 3 there is shown a specific physical construction of inventive mounting or installation apparatus for a base plate which is suitable for this purpose. By referring to FIG. 3 in particular, it should be understood that reference numeral 152 represents a guide housing of a spindle mechanism generally designated by reference numeral 150, and which is mounted at the housing of the control slide mechanism and centered and aligned with regard to such a manner described in my aforementimed patent application in conjunction with FIG. 1 here- 0 Ths guide housing 152, which has a substantially cylindrical cross-sectional configuration and which is provided with a radially extending attachment flange means 154, further is provided with a pressure piston or spindle 158. This pressure spindle 158 is displaceable in a bore 156 provided at the guide housing 152. A radial guide pin 162 which engages with an axial groove provided at the housing 152 prevents rotation of the pressure spindle 158 in the housing 152. A cover member 164 is attached by means of screws 166 or equivalent structure to the underbushing or sleeve 168 extends into the pressure spindle or piston 158 which is constructed as a cylindrical sleeve which is open at one end, as shown. The open end of the cylindrical bushing or sleeve 168 which is at the side of the cover member 164 is closed by a cover plate 170 which is secured by means of screws 172 to the cover member 164. This cover plate 170 is provided with a connection bore 174 for a pressurized medium, pressurized oil for instance. Furthermore, a pressure piston 176 is displaceably arranged in the cylindrical sleeve member 168. The face of the pressure piston 176 which is disposed opposite the cover plate 170 can be contacted by pressurized oil which is admitted through the channel 178 provided at the wall of the cylindrical sleeve 168, as shown.

A piston rod 180 Secured to the pressure piston 176 extends through the bottom portion 182 of the cylindrical sleeve 168. This piston rod 180 is connected via a narrowed end portion 184 with the pressure spindle 158 and specifically by means of the threaded nut member 186.

The pressure spindle 158 carries at its upper surface a pressure plate 190 which is connected with the pressure spindle 158 by the screws 188. The base plate or stone 192 which is to be pressed in its arranged upon this pressure plate 1% and positioned by means of the associated cams 194.

As readily apparent by referring further to FIG. 3, the positioning cams 194 retain the elongate base plate 192, formed of refractory material, in such a position that its geometric center 196, with respect to the plan or cross-sectional shape of the entire base plate 192, is pierced by the longitudinal axis 198 of the pressure spindle 158. As will be further recognized by inspecting FIG. 3, the throughflow opening 200 of the base plate or stone 192 is offset with respect to its geometric center 196. In fact, the axis 202 of the throughflow opening 200 is spaced by the distance 204 from the geometric center 196 of the base plate 192.

Accordingly, a bore 206 is provided in the wall of the substantially sleeve-shaped pressure spindle 158. The axis of this bore 206 coincides with the axis 202 of the throughflow opening 200 of the base plate 192, and likewise is spaced at a distance 204 from the axis 198 of the pressure spindle 158. This bore 206, which is closed at its lower end by a threaded plug 208 houses a piston member 210. This piston member 210 is provided with a piston rod 212 serving as a centering spindle. Piston rod 212 piercingly extends through an opening 214 provided at the pressure plate 190. Furthermore, piston rod 212 carries at its free end a centering mandrel 216, the diameter of which is exactly accommodated to the diameter of the throughflow opening 200 provided at the base plate 192. By selectively admitting pressurized medium to the piston member 210, either via the pressurized oil connection 218 provided at the threadedplug member 208 or via the connection bore 220, it is possible to forwardly advance the centering mandrel 216 out of the opening 214 or after inserting the base plate 192 in the slide housing to remove such mandrel from the bore 200, respectively. On the other hand, the centering mandrel 216 retains the base plate 192, during insertion, in a position where the throughflow opening 200 is in alignment with the pouring opening provided at the non-illustrated bottom stone sleeve member.

While there is shown and described present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto, but may be otherwise variously embodied and practiced within the scope of the following claims.

Accordingly, what is claimed is:

1. A mounting apparatus for the wearing blocks of casting vessels provided with a slide closure mechanism including a slide housing, the improvement comprising a spindle mechanism detachably connected with the slide housing and centered by said slide housing, said spindle mechanism incorporating at least one axially displaceable centering and pressure spindle means serving for pressing in the blocks to a certain predetermined depth in a centered position with respect to the slide housing, said centering and pressure spindle means comprising a pressure spindle means and a separately actuatable centering spindle means, a pressure plate operatively connected with said pressure spindle means, said centering spindle means including a centering mandrel carried thereby.

2. A mounting apparatus as defined in claim 1, further including impact means carried by said pressure plate and cooperating with said slide housing.

3. A mounting apparatus as defined in claim 2, further including centering means provided for said pressure plate and serving for the positioning of a base plate.

4. A mounting apparatus as defined in claim 2, further including a spacer plate detachably secured to said pressure plate, said spacer plate serving for the support of a bottom block sleeve member.

5. A mounting apparatus as defined in claim 1, said centering spindle means being arranged coaxially within said pressure spindle means.

6. A mounting apparatus as defined in claim 5, further including a pressure plate operably connected with said pressure spindle means, guide means for linearly guiding said pressure plate.

7. A mounting apparatus as defined in claim 6, further including guide sleeve means, said pressure spindle means incorporating a press piston for supporting said pressure plate, said press piston being displaceable in said guide sleeve means, said guide sleeve means including an axially extending groove, said press piston incorporating means engaging with said axially extending groove, said groove and engaging means defining said guide means.

8. A mounting apparatus as defined in claim 7, said pressure spindle means further including a threaded spindle member for supporting said press piston, said threaded spindle member being rotatable relative to said press piston, and handcrank means provided for said threaded spindle member for rotating the latter.

9. A mounting apparatus as defined in claim 7, wherein said centering spindle means comprises a threaded spindle which is threaded into said press piston.

10. A mounting apparatus as defined in claim 7, further including a pressure cylinder means and a displaceable actuation piston arranged in said pressure cylinder means, said press piston being operably associated with said actuation piston.

11. A mounting apparatus as defined in claim 10, said actuation piston incorporating a cylinder means and a piston member operatively connected with said centering spindle means, said piston member being slidable in said cylinder means.

12. A mounting apparatus as defined in claim 1, Wherein said centering spindle means includes a centering mandrel capable of entering the throughflow opening of a wearing block, said centering mandrel being supported at said pressure spindle means and being arranged eccentrically with respect to the longitudinal axis of said pressure spindle means.

13. A mounting apparatus as defined in claim 12, further including a pressure plate centrally supported by said pressure spindle means, said centering mandrel being carried directly by said centering spindle means and being axially displaced thereby and piercingly extending through said pressure plate.

14. A mounting apparatus as defined in claim 13, wherein said pressure spindle means incorporates a sleeve member, a guide housing for displaceably receiving said 9 10 sleeve member, a pressure cylinder supported by said References Cited guide housing, said sleeve member surrounding said pres- UNITED STATES PATENTS sure cylinder, a pressure piston arranged in said pressure cylinder, said pressure piston being operatively connected 1879334 9/1932 Kulp 29259 with said pressure spindle means, said centering spindle 5 RICHARD C RIORDON Primary Examiner means including a cylinder and an actuation piston mounted for movement therein, said cylinder of said centering GRAFEL, Assistant EXamineI spindle means being formed by a bore provided at said pressure spindle means, with the longitudinal axis of said bore extending substantially parallel to the longi- 10 tudinal axis of said pressure spindle means. 

